using irule to SNAT SMTP connections

make a wildcard forwarding virtual server for outbound connections

 

 

 

virtual wildcard_fwd_vs {

 

destination any:any

 

mask none

 

ip protocol tcp

 

}

 

 

and assign an iRule:

 

 

when CLIENT_ACCEPTED {

 

switch [ IP::client_addr ] {

 

10.0.0.1 { snat 10.0.200.1 } <<< this is mail server A being snat'd to the mx record address

 

10.0.0.2 { snat 10.0.200.1 } <<< and mail server B to the same address

 

default { snat none } <<< nothing else gets changed

 

}

 

}